Watch case

Details Watch case Watch case

1976-11-09

1979-05-22

Dean, R.

Metal treatment

Compositions

Heat treating

58 88R, 75171, 148162, C22C 1905

Patent

active

041557824

ABSTRACT:
A watch case made of an alloy consisting essentially of 30 to 45% by weight of Cr, 2.5 to 5.0% by weight of Al and the balance essentially Ni, said alloy having been subjected to an aging treatment. The watch case is high in hardness and corrosion resistance and presents a good mirror-like surface.

REFERENCES:
patent: 3015558 (1962-01-01), Grant et al.
patent: 3635703 (1972-01-01), Pissarevsky

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